Electrical plug lock



April 3, 1928.

J. B. HENRY ELECTRICAL PLUG LOCK Filed Jan. 5. 192'? Patented Apr. 3,1928.

JESSE B. HENBY, GONNEBSVILLE, INDIANA.

ELECTRICAL PLUG LOCK.

Application lledlanuary .5, 1927. Serial Io. 159,182.

My said invention relates to a lock or fastener forpreventing theaccidental disconnection of the separable sections of a detachableconnecting plug ada ted to be I inserted in an electric light so'c et orthe like for completing an electrical connection. It is an object of theinvention to provide a lock or fastener of simple and inexpensiveconstruction which may be attached to one 1. of the sections of aconnecting plug and which may be moved into engagement with the othersection for preventing accidental separation when stress is applied tothe conductors or wires connected to one of the II sections.

Referring to the accompanying drawings which are made a part. hereof andon which similar reference characters indicate similar parts,

Figure 1 is a perspective view illustrating one form of my invention,

Figure 2, a side elevation, and Figure 3, a section on line 3-3 ofFigure 2 showing the parts in their two positions.

In the drawings reference character 10 indicates an electrical screwplug adapted to be inserted in an electric llght socketand having adetachable head 11 of the usual construction from -.which extendelectrical 80 conductors 12. As is well-known, a plug of this type isused wherever an extension is desired in the use of various electricalappliances, such as electric irons, vacuum cleaners and the like andconsiderable annoyance is ll occasioned by the head 11 pulling away fromthe plug 10 thus breaking the electrical connectlon.

In order to prevent the accidental separation of the separablesectionsof the. lug I provide a ringmember 13 having dlametricallyopposed perforated-fears 14, such ring being of a size to permit itsbeing readily threaded over the small endof the plug 10,

but being sufiiciently small to revent its passing over such end withoutbelng rotated,

or over the opposite end of such plug. The

arms 14 are bent at substantially right angles to the body of the ringand pivotally support arms 15 of a disk 16,- such arms being alsodiametrically opposd'and bent at substantially right-angles to the bodyof the disk permitting the disk to be swung from a position in axialalin'ement with the opening in the ring to a position substantially 90degrees removed therefrom and at right angles to the'openingji-n thering, or pen-- to a position substantially at right angles incombination with the mitting the disk to be swung from a posi tion inparallelism with the body of the ring through an arc of substantially 90degrees to such ring.

The disk 16 is provided with a slot at one side midway between the arms15, said slot being of a width suflicient to permit the conductors orwires 12 to pass thereinto and 06 extending from the edge of the disk toa polnt sufficient to permitthe wires to pass" to a point'centrally ofthe disk. With this structure the ring 13 maybe threaded over Y the plu'10 and when the head of the plug 1s attac ed thereto the disk 16 may beswung over behind the head or on the opposite side of the head fromtheplug 10 whereupon stress applied to the wires 12 will cause the head 11to engage the disk 16 and be held against being detached from the plug10. If it is desired to break the connection the disk- 16 may be swungto oneside out of the way of the head 11, as shown in dotted lines inFigure 3, to permit the-head to be withdrawn from the plug.

It will be obvious that my device consists of only two very simple partsand may be produced at a very small cost and sold either plug orseparately therefrom but the same fills a long felt want in thisparticular art and various modifications may be made. without departingfrom the spirit of my invention and therefore I do not limit myself towhat is shown in the drawings and described in the s ecification butonly as indicated in the appen ed claims:

Having thus fully described m said invention, what I' claim as new ansecure by Letters Patent, is:

1. The combination with an electrical desire to connection formed ofseparable sections of a ring member arranged to be mounted on' one ofsaid sections, and a disk member pivoted on the. first member andswingable into and out of position to prevent accidental detachment ofthe other section, substantially as set forth.

2. The combination with an electrical connection comprising a pair ofseparable sections, of a ring capable of being slipped over the smallerend of one of said sections, and a member pivoted to said ring andswingable across the other section for permitting accidental separationof said sections, substantially as set forth.

3. The combination with an electrical connection comprising separablesections one of WhlCh 1s provlded with meansv for engagement with anelectrical socket and having an enlar cl portion adjacent thereto,

of an element ormed to slip, over the portion of the section whichengages said socket but being held on said connection when the same isconnected to the socket, and a member pivoted to said element andswingable over the other section for preventing their endwise accidentalseparation, substantially as set forth.

4. A device for preventing the accidental separation of the separablesections of a detachable connecting plug comprising a ring forengagement with one end of the plug, and a i r able to a position at theopposite end of the plug for preventing endwise separation of thesections, substantially as set forth.

5. A device for preventing the accidental separation of the separablesections of a detachable connecting plug comprising a ring for engaement with one end of t e plug, and a ho y pivoted to said ring andswing:

able to a position at the opposite end of the ody pivoted to said ringand sw1ng-' plug for preventing endwise separation of the sections saidbody being slotted to permit the electrical wires to pass to the'centerof the same, substantially as set forth,

6. An electrical connection comprising separable sections, a ringsurrounding one section, oppositely disposed parallel lugs formed onsaid ring, a disk having parallel arms pivoted to said lugs and a slotin said disk to permit the electric wires to pass to the center of thesame to prevent accidental endwise separation ofthe sections, substanJESSE ii. HENRY,

